NOTES ON SOME ACTINIANS FROM THE BAHAMA 

 ISLANDS, COLLECTED BY THE LATE DR. J. I. 

 NORTHROP ' 



By J. Playpair McMurrich, Ph.D. 



(Read April ii, 1896.) 



The Actinians which form the subject of this paper were collected 

 by the late Dr. J. I. Northrop, of Columbia College, during a visit to 

 the Bahama Islands some years ago. It had been Dr. Northrop's 

 intention to work over the collection himself. Before his lamented 

 death he had studied several species more or less thoroughly. The 

 drawings and preparations which he had made were intrusted to me, 

 together with the collection, by Mrs. Northrop, and have proved of 

 great assistance in determining the affinities of certain forms. Espe- 

 cially was this true in regard to Heteractis lucida, whose systematic 

 position Dr. Northrop had correctly determined, and the notes on 

 Diplactis bermudensis and Isaurus duchassaingi were also very full. 



I have taken pains to verify all the important facts contained in the 

 notes, and it has seemed more convenient for the present purpose to 

 describe in my own words the various forms to be considered, rather 

 than to attempt a rearrangement of Dr. Northrop's notes with such 

 additions as might seem necessary. 



The following is a list of the species in the collection. 



HEXACTINI.a; 

 Suborder Actininae 



Family SAGARTID^ 



1. Aiptasia tagetes (Duch. & Mich.) Andr. 



2. Heteraciis lucida Duch. & Mich. 



Family ANTHEAD^ 



3. CondylacHs passiflora Duch. & Mich. 



' Annals N. Y. Acad. Sci., Vol. IX, July, 1896. — 13. 

 103 



